Britain didn't have enough settlements to enforce the claim.
Harass people and eat their substance
The answer is actually Complex drainage systems to keep structures from flooding.
Answer:
Ethnic groups share a common <u>characteristic</u> while religious groups share a common <u>belief</u>.
The population of Puerto Rico traces its ancestry in mostly the Spanish colonists and the indigenous people of the island. They have mixed over time and gradually created a mestizo population, which became the dominant population on the island and still is. There are of course some other influences in the gene pool of the Puerto Ricans, with some of it being from the African continent because of the African slaves that were brought, but it is a small minority, and it is also a population that has been heavily mixed.